Start up disc is full

strange ....
my Macbook pro 2.4 GHz Intel core i5 show a message what it says the start up disk is full when i check out ::: Home : 295 GB
but when i added all my boxes its not even 100 GB.
2 days ago i removed my only one partition from my hard disk and i start to use external disk for backup and i upgrade my mac to lion 10.7.2 . i did every thing i think its possible to make it but it would be a hiden box or file and i don't know how to find it and also i found a strange thing on my home size , it's just raising by itself . any idea ??????

Grand Perspective will tell you where the culprit lies. Be careful and don't just delete files willy-nilly.

start up disc full

strange ....
my Macbook pro 2.4 GHz Intel core i5 show a message what it says the start up disk is full when i check out ::: Home : 295 GB
but when i added all my boxes its not even 100 GB.
2 days ago i removed my only one partition from my hard disk and i start to use external disk for backup and i upgrade my mac to lion 10.7.2 . i did every thing i think its possible to make it but it would be a hiden box or file and i don't know how to find it and also i found a strange thing on my home size , it's just raising by itself . any idea ??????

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